6e2b91c3d1
Fixed FDI stream parameters passed to the 86F handler, FDI stream images now read correctly again; The National Semiconductors PC87306 SuperI/O chip now supports enhanced FDC mode.
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
#include "ibm.h"
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#include "io.h"
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#include "sound_mpu401_uart.h"
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enum
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{
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STATUS_OUTPUT_NOT_READY = 0x40,
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STATUS_INPUT_NOT_READY = 0x80
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};
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static void mpu401_uart_write(uint16_t addr, uint8_t val, void *p)
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{
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mpu401_uart_t *mpu = (mpu401_uart_t *)p;
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if (addr & 1) /*Command*/
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{
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switch (val)
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{
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case 0xff: /*Reset*/
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mpu->rx_data = 0xfe; /*Acknowledge*/
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mpu->status = 0;
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mpu->uart_mode = 0;
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break;
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case 0x3f: /*Enter UART mode*/
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mpu->rx_data = 0xfe; /*Acknowledge*/
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mpu->status = 0;
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mpu->uart_mode = 1;
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break;
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}
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return;
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}
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/*Data*/
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if (mpu->uart_mode)
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midi_write(val);
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}
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static uint8_t mpu401_uart_read(uint16_t addr, void *p)
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{
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mpu401_uart_t *mpu = (mpu401_uart_t *)p;
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if (addr & 1) /*Status*/
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return mpu->status;
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/*Data*/
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mpu->status |= STATUS_INPUT_NOT_READY;
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return mpu->rx_data;
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}
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void mpu401_uart_init(mpu401_uart_t *mpu, uint16_t addr)
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{
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mpu->status = STATUS_INPUT_NOT_READY;
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mpu->uart_mode = 0;
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io_sethandler(addr, 0x0002, mpu401_uart_read, NULL, NULL, mpu401_uart_write, NULL, NULL, mpu);
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}
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